The middle intake supplies the engine with air, while the two outer ones help cool the brakes. (roadandtrack.com)
There were normal settlement cracks where inner walls had moved relative to outer ones over a century. (bookbrowse.com)
Three large air intake apertures - the centre one for cooling the water and oil and the two outer ones for intercooling - add visual drama to RS 6 quattro's front end. (motor-prime.com)